CAPTCHA - Wikipedia
A CAPTCHA (/ ˈkæp.tʃə / KAP-chə) is a type of challenge–response Turing test used in computing to determine whether the user is …
The Official CAPTCHA Site
CAPTCHA: Telling Humans and Computers Apart Automatically A CAPTCHA is a program that protects websites against bots by …
How to spot a CAPTCHA scam | Consumer Advice
Jun 8, 2026 · Here’s how the fake CAPTCHA requests happen…and how you could wind up installing malware on your own device. …
How CAPTCHAs work | What does CAPTCHA mean? - Cloudflare
What is a CAPTCHA? A CAPTCHA test is designed to determine if an online user is really a human and not a bot. CAPTCHA is an …
reCAPTCHA | Google for Developers
reCAPTCHA is a free service that protects your site from spam and abuse. It uses advanced risk analysis techniques to tell humans …
What is CAPTCHA? - IBM
CAPTCHA stands for “completely automated public turing test* to tell computers and humans apart.” It refers to various …
CAPTCHA: What It Is, How to Solve It, and Why It Matters
Feb 11, 2025 · In simpler terms, it's a test designed to determine whether the user is a human or a bot. Websites use CAPTCHA to …
What is a CAPTCHA & How CAPTCHAs Work - DataDome
Feb 28, 2026 · CAPTCHAs were designed to shield and protect websites from malicious bots. But in the age of AI, traditional …
CAPTCHAs 101: what they are, how they work, and where they fall short
Jul 1, 2025 · CAPTCHA stands for Completely Automated Public Turing test to tell Computers and Humans Apart. As the name …
What Is CAPTCHA? Meaning, Definition, Types & Uses | Fortinet
CAPTCHA (Completely Automated Public Turing Test To Tell Computers and Humans Apart) is a system designed to differentiate …